Some worms are a welcome sight to see in your garden -- but others you'll want to get rid of. Here's how to tell which worms ...

In 1881 Charles Darwin wrote: "Without the work of this humble creature, who knows nothing of the benefits he confers upon mankind, agriculture, as we know it, would be very difficult, if ...

Q. You often write about bizarre plants and animals. A few years ago, you wrote about some kind of odd invasive flatworm that eats earthworms. What was it, and is it dangerous to humans? If we find ...